Venkataraman, Anupama and Kanamori, Hiroo
(2004)
Effect of directivity on estimates of radiated seismic energy.
Journal of Geophysical Research B, 109
(B4).
Art. No. B04301.
ISSN 0148-0227.
doi:10.1029/2003JB002548.
https://resolver.caltech.edu/CaltechAUTHORS:20141027-114959570
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Abstract
To accurately estimate the seismic energy radiated in an earthquake, it is important to use appropriate corrections for path and source effects. Using slip models obtained by inversion of seismic data, we examine the effect of directivity on estimates of radiated energy and develop a method to correct for this source effect. From our calculations we suggest that the directivity correction for the earthquakes we studied is less than a factor of three; we also conclude that the directivity correction for dip-slip earthquakes with rupture propagating along strike is less than a factor of two at teleseismic distances. Thus teleseismic energy estimates of large subduction zone earthquakes will not be significantly affected by directivity.
| Item Type: | Article |
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| Additional Information: | Copyright 2004 by the American Geophysical Union.
Received 21 April 2003; revised 28 October 2003; accepted 6 February 2004; published 1 April 2004.
We wish to thank Luis Rivera for helpful discussions on directivity. We thank Jim Mori and Ralph Archuleta for comments and suggestions that considerably improved our manuscript. This research was partially supported by NSF Cooperative Agreements EAR-9909371 and EAR-0125182 and also USGS-HQGR0035. This is contribution 8947 of the Caltech Division of Geological and Planetary Sciences. |
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| Funders: | | Funding Agency | Grant Number |
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| NSF | EAR-9909371 | | NSF | EAR-0125182 | | USGS | HQGR0035 |
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| Subject Keywords: | directivity, radiated seismic energy, radiation pattern, unilateral, Landers, Hector Mine |
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| Other Numbering System: | | Other Numbering System Name | Other Numbering System ID |
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| Caltech Division of Geological and Planetary Sciences | 8947 |
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| Issue or Number: | B4 |
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| Classification Code: | 7209 Seismology: Earthquake dynamics and mechanics; 7215 Seismology: Earthquake parameters; 7260 Seismology: Theory and modeling |
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| DOI: | 10.1029/2003JB002548 |
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| Record Number: | CaltechAUTHORS:20141027-114959570 |
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| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20141027-114959570 |
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| Official Citation: | Venkataraman, A., and H. Kanamori (2004), Effect of directivity on estimates of radiated seismic energy, J. Geophys. Res.,
109, B04301, doi:10.1029/2003JB002548 |
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| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
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| ID Code: | 50855 |
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| Collection: | CaltechAUTHORS |
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| Deposited By: |
George Porter
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| Deposited On: | 27 Oct 2014 20:10 |
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| Last Modified: | 10 Nov 2021 19:01 |
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